Disk-pulverizer.



T. W. GAPEN- IIIIIIIIIIIII R.v

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Patented 00's. '7, 1913.

WITNEEEEE INVENTR- M6/MM r EY K '/f. ATTDQNEY- erica..

THOMAS W. CAPEN, OF IIIIIL'AU'KEE7 'TISCONSEN, ASSIGNOR TO -ALLIS-:CHALMERS COMANY, OF MILWAUKEE, W'ISCONSIN, .A COREORATION lO-E NEW JERSEY.

DISK PULVERIZER.

Specification of Letters '-Patent.

Patented'ct. 7, 1913.

Application filed February 20, 1911. Serial No. 609,552.

To all 'whom t may concern Be it known that I, THOMAS W. CAPEN, a citizen of the United States, residing at Milwaukee, in the county of h/filwaukee and 'State of Wisconsin, have invented a certain new and useful improvement in Disk Pulverizers, of which the following is a specification.

This invention relates to improvements in the construction of pulverizers in which the crushing is eected between two disks disposed at an angle to each Aother and rotatable about intersecting axes.

The object of the invention is to provide a disk pulverizer which is simple in ccnstrnction and eflicient in operation and in which the crushing is effected between two angularly disposed disks one of which is positively rotated, the other being rotated by friction of the material being crushed.

Tn disk Crushers as heretofore constructed, the discharge passage formed between the disks has been more or less obstructed by driving means connecting with the driving power across the discharge opening between the disks.

It is an object of the present invention to avoid the use of such obstructions in the discharge passage from the crushing chamber.

A clear conception of one embodiment of the invention may be had by referring to the accompanying drawing in which like reference characters designate the same parts in different views.

Figure 1 is a central vertical section through a disk Crusher showing the unobstructed discharge passage therefrom. Fig. 2 is a transverse horizontal section through the Crusher, the section being taken along the line TT-IT of Fig. 1, looking in the direction of the arrow.

The main shaft 7 of the crusher, which as shown is vertically disposed but which might be disposed horizontally, is supported upon the crusher base 15 by means of a thrust bearing 16. The upper concave crushing disk 5, which may, however, be convex if desired, is mounted upon the upper end of the main shaft 7, being adjustable on the shaft by means of a nut 4. A feed passage 2 is formed through the upper end of the shaft 7 and has discharge passages 3 leading therefrom below the crushing disk 5 and directed radially to the shaft. The feed hopper 1 is located directly above the feed passage 2 and is fixed to a stationary frame portion, not shown. The lower concave crushing disk 6, which has a sleeve 8 formed in one therewith, is supported upon a bearing ring 11 which is in turn supported upon the shaft 7 by a collar 12 formed on the shaft 7. The disk 6 and sleeve Shave their common axis inclined toward and intersecting the axis of the shaft 7 at .a `point intermediate the two concave disks 5, 6. This yinclination of the axes necessitates the formation of the bore of the sleeve 8 along a slight taper, such vtaper formation `producing line contact between the sleeve 8 and main shaft 7 and also producing a space 17 between these members. The ring 11 has coast-ion with the sleeve 8 along a spherical surface having the intersection of the disk axes as a generating center. The stationary sleeve 10 which is connected to the base of the frame 15 by means of a series of ribs, has a through bore along which the outer surface of the sleeve 8 coacts. The axis of the bore of the sleeve 10 coincides with the central axis of the sleeve 8 and is therefore slightly angular to the axis of the main shaft 7.

The driving pulley 14 is secured to the lower end of the main shaft 7 by means of keys 13 and is adapted to receive its driving power from any suitable source, not shown. Suitable packing 9, which may be of any desired form, is interposed between the main shaft 7 and the upper inner edge of the lower crushing disk 6 and prevents the passage of gritty material to the space 17.

During the operation of the Crusher, the upper crushing disk 5 is given a rapid rotation by means of the power applied -to the driving pulley 14. Material to beycrushed is fed through the hopper linto the feed passage Q, from which it is discharged through the openings 8 to 'the lcrushing chamber formed intermediate the disks 5, 6. In the crushing chamber the raw material is forced outwardly toward the periphery of the disks by the centrifugal force resulting from the rapid rotation of the disk 5. As the material is wedged between the two disks 5, 6, the resulting friction causes the lower crushing disk 6 to rotate at substantially the same speed as that of the upper disk 5. The material in its outward travel is wedged between the two disks at points of maximum dist-ance between them, these point-s being shown to the left of the shaft axis in Fig. 1. 110

As t-he disks 5, 6, rotate, the concave surfaces approach each other, thus crushing the material between the disks in a manner similar to the action of a jaw Crusher. The approach of the disk surfaces is due to the angularity between theirv axes, the degree of approach, and hence the degree of crushing, depending on the degree of angularity between the axes.

The crushing` action between oppositely disposed points on the disks takes place only during one-half of a co-mplete revolution of these points, the remaining half revolution being utilized in permitting the centrifugal action to force the crushed material nearer j the periphery of the disks 5, 6. It will be v crushed to a sufficient degree of iineness to permit its passage from the discharge opening or passage between the disks. It will also be noted that by forming a driving connection to the upper disk 5 near the midportion of the Crusher, the Vimpact of rapidly moving material against the driving elements, such as results by placing the driving connection across the discharge opening between the disks, is entirely avoided. In using this type of Crusher on raw material containing shale or flat pieces of rock, it may be desirable to provide a means for preventing the free passage of the flat pieces through the Crusher.

It should be understood that it is not desired to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilled in the art.

It is claimed and desired to secure by Letters Patent,-

1. In a Crusher, a shaft, means for rotating said shaft, a disk fixed to said shaft, and a second disk adjacent said first disk and surrounding said shaft at a portion thereof intermediate said rotating means and said vfirst disk, said disks being inclined relative to each other and being free from structural discharge obstructing elements adjacent their peripheries.

2. In a Crusher, two crushing disks mounted with their axes at an angle to each other and having a crushing chamber between them, means for rotating one of said disks on its aXis, said rotating means eX- tending through and in direct engagement with the mid-portion of the other of said disks.

3. In a crusher, two disks, a cylindrical journal portion extending directly and concentrically from the mid-portion of each of said disks, said journal portions being on the same sides of the said disks in their assembled relation, and said journal portions having intersecting axes, bearings for said journal portions, and means for driving at least one of said disks.

4L. In a Crusher, two rotatable disks, a concentric journal portion associated with each of said disks, and a frame supporting said disks with their axes intersecting each other, said disks having an annular discharge passage entirely freefrom obstruction by movable parts.

5. In a crusher, two rotatable disks, a concentric journal portion associated with each of said disks, a frame supporting said disks with their axes at a slight angle to each other, and bearing surfaces associated with said disks and rotatable therewith for transferring the crushing reaction of one disk to the back of the other disk, said disks having an annular discharge passage entirely free from obstruction by movable parts. l

6. In a Crusher, a shaft, means for rotating said shaft, a disk fixed to said shaft and having a crushing surface facing said rotating means, and a second disk adjacent said first disk and surrounding said shaft, said second disk having a crushing surface facing the crushing surface of said rst disk, and said disks being inclined relative to each other.

In testimony whereof, I aiiiX my signature in the presence of two witnesses.

THOMAS W. CAPEN.

l/Vitnesses:

Cr-rAs. Il. BYRON, W. I-I. LIEBER.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington," D. C. 

